It is shown that the exotic non-qqq hadrons of pentaquark qqqqq̄ states can be clearly distinguished from the conventional qqq-baryon resonances or their hybrids if the flavor of q̄ is different from any of the other four quarks. We suggest the physical process p(e,e′K-)Z(uuuds̄), which can be investigated at the Thomas Jefferson National Accelerator Facility (JLab), as an ideal process to search for the existence or non-existence of the exotic hadron of minimal pentaquark state Z(uuuds̄).